// ***************************************************************************
// ***************************************************************************
// Copyright 2011(c) Analog Devices, Inc.
// 
// All rights reserved.
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// are permitted provided that the following conditions are met:
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//     - Use of the software either in source or binary form, must be run
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// ***************************************************************************
// ***************************************************************************
// serial data output interface: serdes(x8) or oddr(x2) output module

`timescale 1ps/1ps

module ad_serdes_clk (

  // clock and divided clock

  mmcm_rst,
  clk_in_p,
  clk_in_n,

  clk,
  div_clk,

  // drp interface

  up_clk,
  up_rstn,
  up_drp_sel,
  up_drp_wr,
  up_drp_addr,
  up_drp_wdata,
  up_drp_rdata,
  up_drp_ready,
  up_drp_locked);

  // parameters

  parameter   SERDES_OR_DDR_N = 1;
  parameter   MMCM_OR_BUFR_N = 1;
  parameter   MMCM_DEVICE_TYPE = 0;
  parameter   MMCM_CLKIN_PERIOD  = 1.667;
  parameter   MMCM_VCO_DIV  = 6;
  parameter   MMCM_VCO_MUL = 12.000;
  parameter   MMCM_CLK0_DIV = 2.000;
  parameter   MMCM_CLK1_DIV = 6;

  // clock and divided clock

  input           mmcm_rst;
  input           clk_in_p;
  input           clk_in_n;

  output          clk;
  output          div_clk;

  // drp interface

  input           up_clk;
  input           up_rstn;
  input           up_drp_sel;
  input           up_drp_wr;
  input   [11:0]  up_drp_addr;
  input   [15:0]  up_drp_wdata;
  output  [15:0]  up_drp_rdata;
  output          up_drp_ready;
  output          up_drp_locked;

  // internal signals

  wire            clk_in_s;

  // instantiations

  IBUFGDS i_clk_in_ibuf (
    .I (clk_in_p),
    .IB (clk_in_n),
    .O (clk_in_s));

  generate
  if (MMCM_OR_BUFR_N == 1) begin
  ad_mmcm_drp #(
    .MMCM_DEVICE_TYPE (MMCM_DEVICE_TYPE),
    .MMCM_CLKIN_PERIOD  (MMCM_CLKIN_PERIOD),
    .MMCM_VCO_DIV  (MMCM_VCO_DIV),
    .MMCM_VCO_MUL (MMCM_VCO_MUL),
    .MMCM_CLK0_DIV (MMCM_CLK0_DIV),
    .MMCM_CLK1_DIV (MMCM_CLK1_DIV))
  i_mmcm_drp (
    .clk (clk_in_s),
    .clk_sel (1'b1),
    .mmcm_rst (mmcm_rst),
    .mmcm_clk_0 (clk),
    .mmcm_clk_1 (div_clk),
    .up_clk (up_clk),
    .up_rstn (up_rstn),
    .up_drp_sel (up_drp_sel),
    .up_drp_wr (up_drp_wr),
    .up_drp_addr (up_drp_addr),
    .up_drp_wdata (up_drp_wdata),
    .up_drp_rdata (up_drp_rdata),
    .up_drp_ready (up_drp_ready),
    .up_drp_locked (up_drp_locked));
  end

  if ((MMCM_OR_BUFR_N == 0) && (SERDES_OR_DDR_N == 0)) begin
  BUFR #(.BUFR_DIVIDE("BYPASS")) i_clk_buf (
    .CLR (1'b0),
    .CE (1'b1),
    .I (clk_in_s),
    .O (clk));

  assign div_clk = clk;
  end

  if ((MMCM_OR_BUFR_N == 0) && (SERDES_OR_DDR_N == 1)) begin
  BUFIO i_clk_buf (
    .I (clk_in_s),
    .O (clk));

  BUFR #(.BUFR_DIVIDE("4")) i_div_clk_buf (
    .CLR (1'b0),
    .CE (1'b1),
    .I (clk_in_s),
    .O (div_clk));
  end
  endgenerate

endmodule

// ***************************************************************************
// ***************************************************************************